1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2010 Lennart Poettering
15 #include "conf-files.h"
16 #include "dirent-util.h"
22 #include "path-util.h"
23 #include "stat-util.h"
24 #include "string-util.h"
28 static int files_add(Hashmap *h, const char *suffix, const char *root, unsigned flags, const char *path) {
29 _cleanup_closedir_ DIR *dir = NULL;
36 dirpath = prefix_roota(root, path);
38 dir = opendir(dirpath);
45 FOREACH_DIRENT(de, dir, return -errno) {
48 if (!dirent_is_file_with_suffix(de, suffix)) {
49 log_debug("Ignoring %s/%s, because it's not a regular file with suffix %s.", dirpath, de->d_name, strna(suffix));
53 if (flags & CONF_FILES_EXECUTABLE) {
56 /* As requested: check if the file is marked exectuable. Note that we don't check access(X_OK)
57 * here, as we care about whether the file is marked executable at all, and not whether it is
58 * executable for us, because if such errors are stuff we should log about. */
60 if (fstatat(dirfd(dir), de->d_name, &st, 0) < 0) {
61 log_debug_errno(errno, "Failed to stat %s/%s, ignoring: %m", dirpath, de->d_name);
65 if (!null_or_empty(&st)) {
66 /* A mask is a symlink to /dev/null or an empty file. It does not even
67 * have to be executable. Other entries must be regular executable files
68 * or symlinks to them. */
69 if (S_ISREG(st.st_mode)) {
70 if ((st.st_mode & 0111) == 0) { /* not executable */
71 log_debug("Ignoring %s/%s, as it is not marked executable.",
76 log_debug("Ignoring %s/%s, as it is neither a regular file nor a mask.",
83 p = strjoin(dirpath, "/", de->d_name);
87 r = hashmap_put(h, basename(p), p);
89 log_debug("Skipping overridden file: %s.", p);
95 log_debug("Duplicate file %s", p);
103 static int base_cmp(const void *a, const void *b) {
106 s1 = *(char * const *)a;
107 s2 = *(char * const *)b;
108 return strcmp(basename(s1), basename(s2));
111 static int conf_files_list_strv_internal(char ***strv, const char *suffix, const char *root, unsigned flags, char **dirs) {
112 _cleanup_hashmap_free_ Hashmap *fh = NULL;
118 /* This alters the dirs string array */
119 if (!path_strv_resolve_uniq(dirs, root))
122 fh = hashmap_new(&string_hash_ops);
126 STRV_FOREACH(p, dirs) {
127 r = files_add(fh, suffix, root, flags, *p);
131 log_debug_errno(r, "Failed to search for files in %s, ignoring: %m", *p);
134 files = hashmap_get_strv(fh);
138 qsort_safe(files, hashmap_size(fh), sizeof(char *), base_cmp);
144 int conf_files_insert(char ***strv, const char *root, char **dirs, const char *path) {
145 /* Insert a path into strv, at the place honouring the usual sorting rules:
146 * - we first compare by the basename
147 * - and then we compare by dirname, allowing just one file with the given
149 * This means that we will
150 * - add a new entry if basename(path) was not on the list,
151 * - do nothing if an entry with higher priority was already present,
152 * - do nothing if our new entry matches the existing entry,
153 * - replace the existing entry if our new entry has higher priority.
159 for (i = 0; i < strv_length(*strv); i++) {
162 c = base_cmp(*strv + i, &path);
166 /* Oh, we found our spot and it already contains something. */
167 STRV_FOREACH(dir, dirs) {
170 p1 = path_startswith((*strv)[i], root);
172 /* Skip "/" in *dir, because p1 is without "/" too */
173 p1 = path_startswith(p1, *dir + 1);
175 /* Existing entry with higher priority
176 * or same priority, no need to do anything. */
179 p2 = path_startswith(path, *dir);
181 /* Our new entry has higher priority */
182 t = path_join(root, path, NULL);
186 return free_and_replace((*strv)[i], t);
191 /* Following files have lower priority, let's go insert our
195 /* … we are not there yet, let's continue */
198 t = path_join(root, path, NULL);
202 r = strv_insert(strv, i, t);
208 int conf_files_insert_nulstr(char ***strv, const char *root, const char *dirs, const char *path) {
209 _cleanup_strv_free_ char **d = NULL;
213 d = strv_split_nulstr(dirs);
217 return conf_files_insert(strv, root, d, path);
220 int conf_files_list_strv(char ***strv, const char *suffix, const char *root, unsigned flags, const char* const* dirs) {
221 _cleanup_strv_free_ char **copy = NULL;
225 copy = strv_copy((char**) dirs);
229 return conf_files_list_strv_internal(strv, suffix, root, flags, copy);
232 int conf_files_list(char ***strv, const char *suffix, const char *root, unsigned flags, const char *dir, ...) {
233 _cleanup_strv_free_ char **dirs = NULL;
239 dirs = strv_new_ap(dir, ap);
245 return conf_files_list_strv_internal(strv, suffix, root, flags, dirs);
248 int conf_files_list_nulstr(char ***strv, const char *suffix, const char *root, unsigned flags, const char *dirs) {
249 _cleanup_strv_free_ char **d = NULL;
253 d = strv_split_nulstr(dirs);
257 return conf_files_list_strv_internal(strv, suffix, root, flags, d);